Hey Ralph...Do you get a VDI reading when in the AM mode

[Dan(NM)]

Or is it used for another function when running all metal ??

 

[Ralph Bryant]

The actual VDI numbers work in either mode of operation. If you discriminate out any numbers between 0-79 on the discrimination side, you will get no screen reading or reaction when passing over targets within the discriminated range. The same number segment is used while tuning the sensitivity, discrimination level, or number of tones in discriminate mode, or the sensitivity, hum level (threshold), or manual ground balance level in the all-metal mode, and also for the frequency shift, and depth readings or ground phase value when using the grab GB or pinpoint features accessed by the trigger switch.

Ralph

 

[Dan(NM)]

I was hoping you'd say that....what about any tonal change in all metal other than modulated ??

 

[Ralph Bryant]

Just the one all-metal tone "range", since it resembles more of a VCO type audio than a straight single tone. Pitch and volume rise together somewhat, but not to the same degree as you might normally think of as true VCO. It's "different".

Ralph

 

[Mike Hillis]

The threshold hum has 45 positions above a zero setting and 45 positions below zero. What I like about the All metal mode, is that I can take the threshold below zero to where the all metal signal sounds crisp around the edges.

Instead of the gradual rise over a target you get when using a positive audio threshold, using the negative threshold settings give a clearer, sharper response. I find it easier to size targets with and hear the broad response of iron.

Pinpoint mode works good in this respect as well.

Tomorrow!